This extension hook has no documentation on MediaWiki.org. Please improve MediaWiki by adding documentation to it. See Template:ExtensionHook for instructions on how to do it.

For examples of extensions using this hook, see Category:VisualData::OnFormSubmit extensions . Category:Extension hooks#VisualData::OnFormSubmit Category:Undocumented extension hooks#VisualData::OnFormSubmit Category:Extension hooks provided by VisualData Category:Extension hooks#VisualData::OnFormSubmit Category:Undocumented extension hooks#VisualData::OnFormSubmit Category:Extension hooks provided by VisualData